Report your suggestion on bugzilla.mozilla.org and don't tag a 3rd party Firefox community.

If you hate webp because you can't easily view it, let me recommend ImageGlass as a replacement image viewer for Windows (maybe Linux too, I forget).

@MisterMoo @firefox Echoing this!!! Stop it with webp entirely!!! NONE of the applications I use accept webp as input where images need to be uploaded! Not even Discord!

Isn't ImageMagick available on Windows too?

I just change the file extension to PNG and call it a day. Somehow it fixes all my compatibility issues.

@MisterMoo @firefox I use the extension "Don't accept image/webp" don't know if that would help for your use case. but it does do it for the right click/saveas

@MisterMoo @firefox

I was looking for a fix that didn't involve yet another extension, but only found how to block webp entirely which would just result in broken image links. Sadly i also found that this is a security vulnerability, likely deliberate for data harvesting, and has been a problem for FOUR YEARS. It's only the incidence that is picking up now.

I want youtube downloads to stop being in webm. I set my gui app that downloads to prefer mp4 even if it's lower quality. I will do the same with my command line tools when I get around to it or get frustrated enough that they aren't supported by QuickLook on my Mac.